Original Characters

Genji Kurosawa

Sakura’s younger (chronologically) brother. After learning his sister’s secret, he volunteers to become Franchouchou’s music producer.

Big Brother Instinct: Inverted, since even though Genji is now physically older than Sakura, he is still the second-born child. Nevertheless, Genji is very protective of Sakura, showing anger at Kotaro for raising her from the dead while still staying at her side, being willing to keep her secret safe and support her dream.
Big Little Brother: Sakura's little brother outgrew her following her death and is now in his early twenties while Sakura physically remains seventeen due to being a zombie. Renoir even mistakes Genji for the older brother
Bratty Half-Pint: He was this in his youth, having acted obnoxious towards Sakura ever since their parents divorced and they started living separately. Genji regrets acting like a brat after Sakura dies and has been haunted with it ever since.
Deadpan Snarker: Can’t help but comment on the absurdity of existing in a world with zombies. He’s even snarkiest when it comes to Kotaro.
Jerk with a Heart of Gold: A blunt and abrasive man, but at the same time he deeply loves his sister and is supportive of her dream as an idol. Most of his obnoxious moments are directed towards Tatsumi.

Ai’s mother. A doctor from Tokyo, she travels to Saga when news breaks to her of an idol that looks just like her deceased daughter.

Big Damn Reunion: She and her daughter reunite for the first time in ten years, her daughter now brought back as a zombie.
The Confidant: Okoba clues her in to his findings on Franchouchou, realizing she was in Saga investigating the identity of Franchouchou's "No.3".
Like a Daughter to Me: She's very kind towards Junko, her daughter's girlfriend, offering her a place to stay alongside Ai.
Mama Bear: She is very protective of her daughter Ai, always making sure she is on guard against the shadiest parts of the Idol Industry and refused to talk with nosy reporters who wanted to get a scoop of Ai's status as a legend following her death. Aoi hates Kotaro Tatsumi for raising her daughter as a zombie, and the only reason she isn't slapping him silly is because she's trying to keep it cool for Ai's sake.
Outliving One's Offspring: She's been wracked with grief over her daughter's death for years.
Strong Family Resemblance: She’s described as looking like an older version of Ai complete with longer hair and facial wrinkles.

A down-on-his-luck man recently unemployed. He gets unwillingly wrapped up working with Franchouchou after seeing Sakura as a zombie.

Born Unlucky: Gives Franchouchou a run for their money in terms of misfortune befalling him.
Butt-Monkey: He’s introduced passing out from exhaustion onto the table Sakura and Genji were meeting at. It just gets more absurd from there.
Entertainingly Wrong: Assumed Genji was Sakura's older brother after meeting them a second time. He's correct in the physical sense but doesn't know that Genji is actually the second-born child. Understandable, since Genji is taller than Sakura and Renoir was not yet aware that Sakura is actually a zombie.
Those Two Guys: He assists Genji a lot as Franchouchou’s helpers.